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stock of the oceans and finding some amazing things. as mark phillips reports, french researchers say they found 1.5 million previously unknown species. >> reporter: it's a big expedition looking at some of the world's smallest but most important creatures. the terra is a sailing research vessel that has just completed a 21-year, 70,000-mile voyage looking for plankton, the microscopic creatures at the bottom of the food chain whose role is messivassive. >> they create oxygen, so incredibly important on the scale, and they take carbon dioxide out of the atmosphere. >> reporter: they collected sea water and found, they say, about 1.5 million species of plankton, twice the number previously known. they found something else, too. minute shreds of plastic. in fact, they found more plastic than plankton, especially in the a antarctic. >> we thought that areas like the antarctic were very pristine, being very isolated far away from humanity. the fact that we found plastic debris down there in terms of tens of thousands of pieces per square kilometer is really very sad because td because thi
'm mark phillips in london. >> i think gigi just says thanks, dad, you stop talking. the other thing he says about his daughter is she does volunteer work. she's a very good girl who d >>> got to get your >>> got to get your tissues ready. flu season is on the way. we'll help you tell the difference, and there is a difference between the flu and the common cold. we'll explain on "cbs this morning." living with moderate to severe rheumatoid arthritis means living with pain. it could also mean living with joint damage. help relieve the pain and stop the damage with humira, adalimumab. for many adults with moderate to severe ra, humira is clinically proven to help relieve pain and stop joint damage. so you can treat more than just the pain. humira can lower your ability to fight infections, including tuberculosis. serious, sometimes fatal events, such as infections, lymphoma, or other types of cancer, have happened. blood, liver and nervous system problems, serious allergic reactions, and new or worsening heart failure have occurred. before starting humira, your doctor should test you for
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